org.slf4j slf4j-parent 1.1.0-beta0 4.0.0 org.slf4j slf4j-log4j12 ${parent.version} jar SLF4J LOG4J-12 Binding http://www.slf4j.org The slf4j log4j-12 binding org.slf4j slf4j-api ${project.version} log4j log4j 1.2.13